package main

import "fmt"

func main() {
	sum := 0
	for i := 0; i < 10; i++ {
		sum += 1
	}
	fmt.Println(sum)
	fmt.Println("===============")
	for sum < 20 {
		sum += 3
		fmt.Println(sum)
	}
	fmt.Println("===============")
	for {
		sum += 4
		if sum > 30 {
			break
		}
		fmt.Println(sum)
	}
}
